title: Comparison of intensity and absolute contrast of simulated and experimental high-resolution transmission electron microscopy images for different multislice simulation methods.
abstract: The Stobbs factor problem, a major difference of absolute contrast between experimental and simulated high resolution transmission electron microscopy images has been reported frequently. In this respect, some modifications to the multislice simulation techniques were proposed to improve the correspondence to the experiment. The influence of different suggestions on the simulated contrast is investigated by numerical simulations. The agreement between experiment and simulations is then checked by comparison with high-resolution micrographs of crystalline gold. The experimental data is therefore compared to simulated intensities computed for the thickness and orientation of the specimen measured by refinements of diffraction patterns. The agreement of both intensity and contrast is investigated and the remaining contrast discrepancy is determined. The results show a good agreement for a small objective aperture, while for a larger aperture a difference of contrast by a factor of 1.2 can still be observed. Without any aperture, the deviation between experiment and simulations is largest.
authors.affiliation: Institut für Festkörperphysik, Universität Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany. Electronic address: f.krause@ifp.uni-bremen.de.
authors.forename: Florian F
authors.initials: FF
authors.lastname: Krause
authors.forename: Knut
authors.initials: K
authors.lastname: Müller
authors.forename: Dennis
authors.initials: D
authors.lastname: Zillmann
authors.forename: Jacob
authors.initials: J
authors.lastname: Jansen
authors.forename: Marco
authors.initials: M
authors.lastname: Schowalter
authors.forename: Andreas
authors.initials: A
authors.lastname: Rosenauer
mesh_terms: D003198:Computer Simulation; D003460:Crystallization / Q000379:methods; D055032:Electron Microscope Tomography / Q000379:methods*; D046529:Microscopy, Electron, Transmission / Q000379:methods*
keywords: Frozen lattice simulation; HRTEM; Incoherent summation; MTF; Stobbs factor